Sitz bath



FIG. 1 is a front elevational view of a sitz bath showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof, the right side being a mirror image of the left side;

FIG. 4 is a top view of thereof; and,

FIG. 5 is a bottom view of thereof. 

The ornamental design for a sitz bath, as shown and described. 